Repeated exposure to addictive drugs causes unmistakable changes to occur on both a neuronal and a behavioral level. Certain circuits in the brain of an addict are forced to change and adapt to an environment of drug-induced chemical imbalance....

A career in construction exposes a tradesperson to an ever changing environment with known as well as unknown hazards. Unfortunately one of the unknowns is the use of illicit substances and the abuse of legal medications by some of the workers. ...

During the 1980's, Latin America was one of the major concerns of the U.S. foreign policy. Countries like Nicaragua, Panama, Peru and Colombia had unstable governments and civil war created a clear and present danger to the national security of the...